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CHPA S
ERIES
The Local, Remote, and Computer modes are the main user interface modes.
•
All control points will always provide status.
•
Front panel push-button labeled LCL/RMT will toggle between all control points. The front
panel is the "super-user" and may transfer the control point at any time.
•
If the control point is transferred from the front panel (LOCAL) to the remote panel
(REMOTE) or the CIF, the remote panel may transfer control between itself and CIF.
•
No control transfer may be commanded via the CIF port.
3.3 Serial Remote Interface
The CHPA Serial Remote Interface is typically used to support serial communications with a
remote control unit, such as the CPI CHPA Remote unit. This port does support multi-drop RS-
422/485 (4-wire) serial communications; even at high baud rates (such as 9600 baud) this port
will support communications over a 4000-ft (1200-m) serial cable.
The Serial Remote Interface can be configured for use with the CHPA Remote unit or for use
with a remote computer similar to the CIF port. To configure the port type, press the MENU
button until the selection RMT CONFIGURATION is displayed. PORT TYPE should be
displayed on Line 4 (press the FUNCTION key if it isn't); use the arrow keys to select either
USER or RMTPNL. RMTPNL will configure the port for the CHPA Remote panel. No other
entries will be available. USER will make the port act similarly to the CIF port. All of the same
protocol and command set choices will be available (press the FUNCTION button to access
these selections). The port will still be subject to the control mode hierarchy described earlier.
The CHPA Serial Remote Interface (J6) is a dual-function port. One of two modes are selectable:
remote panel (RMTPNL) or remote computer (USER). The CHPA Front Panel controls and
indicators are used to configure this port. Selection of RMTPNL automatically configures the
port for "plug and play" operation with a CPI CHPA Remote Control Panel. In this mode, the
remote panel is connected to the port with a "straight" cable (pin to pin connection) and after
connection is immediately available for normal REMOTE operation. When RMT is selected on
the Front Panel of the CHPA (LCL/RMT pushbutton), all remote control are enabled. Refer to
Appendix B for a description of the Remote Control Panel controls and indicators, and Chapter
5, CHPA Control Modes and Hierarchy for more detail on the remote control operation.
Note: The physical size of the Remote Control Panel is not the same as the
Front Panel of the CHPA.
In the remote computer control mode (USER), this port provides a second computer control
interface that has all of the functions and capability of the "CIF" port (J7). This port supports
multi-drop RS-422/485 (4-wire) serial communications at high band rates (e.g., 9600 baud) over
a 4000 ft, (1200 m) serial cable. If RMTPNL is selected, no further entries are required. If USER
is selected, the port becomes a second CIF port. When USER is selected, the port must be
reconfigured from the default (RMTPNL) to a user defined configuration. Refer to Table 3-1 for
J6 pin assignments.
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